Having this problem of UE4 crashing every time I try to reimport a static mesh I updated in Maya. I go and hit reimport on the static mesh in the UE4 Content Browser and UE4 immediately crashes. I know this model is nowhere near as complex as other models I've imported into UE4. I'm currently using 4.6.1 version of UE4.…
It most likely has something to do with how the mesh vertices were stored in the model file, and UE4 choking on some bad data. I think I ran into something similar once, but I cannot remember exactly what it was, other than baking out to OBJ or something, then re-exporting that as an FBX fixed it.